402-2 - GY 402 Sedimentary Petrology Lecture 2: Summary of...

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1 GY 402 Sedimentary Petrology Lecture 2: Summary of Important Grain size Parameters Simplified classification of grain size in sedimentary rocks (Haywick, 1999) Visual estimation of important sedimentary parameters (Haywick, 1999)
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2 Udden-Wentorth Grain Size Scale (Wentworth, 1922)
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3 Grain Rounding Determination-“Quantitative” (Folk, 1980) Grain Rounding Determination-“Qualitative” (Powers, 1953)
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4 Grain Size Ternary Plot 1 Sand-Silt-Clay (Folk, 1954; 1980) Symbol Index C-clay; Z-silt; M-mud; S-sand; sC-sandy clay; sM-sandy mud; sZ- sandy silt; cS-clayey sand; mS-muddy sand; zS-silty sand Folk, R.L., 1954. The distinction between grain size and mineral composition in sedimentary rocks. Journal of Geology , 62 , 344-359. Folk, R.L., 1980. Petrology of Sedimentary Rocks. Hemphill Publishing, Austin, TX, 184p.
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5 Grain Size Ternary Plot 2 Sand-Silt-Clay (Derived from Krumbein and Sloss, 1963; Picard, 1971 and others) (Preferred method of Haywick) Symbol Index C-clay; Z-silt; S-sand;
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402-2 - GY 402 Sedimentary Petrology Lecture 2: Summary of...

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